SP505 View Datasheet(PDF) - Exar Corporation

Part Name

Description

Manufacturer

SP505

WAN Multi-Mode Serial Transceiver

Exar Corporation 

Output

U nde r

Test C L

500Ω

S1

VCC

S2

R eceiver

Output

Test P oint

1KΩ

S1

VCC

CRL

1KΩ

S2

Figure 34. Driver Timing Test Load Circuit

Figure 35. Receiver Timing Test Load Circuit

DRIVER +3V

INPUT 0V

A

DRIVER

OUTPUT B

DIFFERENTIAL VO+

OUTPUT 0V

VA - VB VO–

tSKEW = │tDPLH - tDPHL │

f ≥ 5MHz; tR ≤ 10ns; tF ≤ 10ns

1.5V

tPLH

tPHL

VO 1/2VO

tDPLH

tDPHL

tR

Figure 36. Driver Propagation Delays

1.5V

1/2VO

tF

TXENABLE +3V

DECX 0V

5V

A, B

VOL

VOH

A, B

0V

f = 1MHz; tR ≤ 10ns; tF ≤ 10ns

1.5V

tZL

2.3V Output normally LOW

2.3V

tZH

Output normally HIGH

Figure 37. Driver Enable and Disable Times

1.5V

tLZ

0.5V

0.5V

tHZ

A–B

V0D2 +

V 0D2–

V OH

R E CE IVE R OUT

VOL

tPLH

tSKEW = | tPHL - tPLH |

f > 5MHz; tR < 10ns ; tF < 10ns

0V

INP UT

OUTP UT

(V OH - V OL )/2

tPHL

0V

(V OH - VOL )/2

Figure 38. Receiver Propagation Delays

Exar Coporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • Fax (510) 668-7017 • www.exar.com

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SP505_100_081308

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